What did Plato do to spread Socrates Beliefs?

Plato expressed his ideas in numerous 'dialogues'. In his earliest dialogues Plato develops the ideas of Socrates through portrayals of Socrates' discussions with his contemporaries that proceed by questions and answers. Socrates is represented as asking a question and then analyzing the respondent's answer to generate more and better answers. Over time Plato gradually introduced his own, more developed, ideas in place of those of Socrates, though he still used Socrates as the speaker of these ideas. This created the problem of not knowing where Socrates leaves off and Plato's own ideas begin; the Socratic Problem.